Golden ratio

@grid: 1x1x7 / 60vmin / + .6;
@size: 100%;
box-shadow: inset 0 0 0 1px #000;
margin: 1px;
border-radius: 100% 0 0 0;
place-self: start;
translate: -32% 0;
transform-origin: 0 100%;
@cell (i > 1) {
  @size: 61.8%;
  translate: 161.8% -100%;
  rotate: 90deg;
}